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£55+ Cheap flights from San Francisco

This is the cheapest return flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 8/10. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
SFO — LHR
12 Oct — 19 Oct1
1 adult
1 adult, Economy

What to know about flights from San Francisco

Discover essential information about flights departing from San Francisco, including flight schedules, destinations, airlines operating at the San Francisco airport, and any specific guidelines or requirements for travellers. Please note that the information is based on the most recent updates available. Data last updated 12 September 2025.

Cheapest one-way flight

£26

Cheapest round-trip flight

£74

Cheapest airline

Frontier

Most popular destination

Los Angeles (LAX)

Good round-trip deal

£93 or less

Good one-way deal

£56 or less
The cheapest one-way flight from San Francisco is currently to Las Vegas Harry Reid Intl.
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The cheapest round-trip flight from San Francisco is currently to Los Angeles.
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On average, Frontier currently has the cheapest one-way flight from San Francisco (avg. price of £49).
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Los Angeles (LAX) is currently the most popular flight destination from San Francisco (average return price of £87).
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Price to beat on a round-trip flight from San Francisco.
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Price to beat on a one-way flight from San Francisco.
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Find flights from San Francisco

Cheapest flights from San Francisco
Explore the most affordable flight options available from San Francisco. Find the lowest fares based on data from user searches, with prices last updated on 12 September 2025.

Fri 24/1021:05SFO - BOS
1 stop9h 55mSouthwest
Tue 28/1005:30BOS - SFO
1 stop11h 00mSouthwest
Deal found 10/9£157
Tue 3/206:05SFO - BOS
2 stops11h 45mSouthwest
Tue 17/205:50BOS - SFO
2 stops12h 00mSouthwest
Deal found 10/9£159
Tue 7/1021:05SFO - BOS
1 stop8h 20mSouthwest
Fri 14/1106:10BOS - SFO
1 stop10h 55mSouthwest
Deal found 10/9£159
Sat 25/1010:55SFO - BOS
1 stop9h 25mSouthwest
Tue 28/1007:50BOS - SFO
2 stops10h 10mSouthwest
Deal found 10/9£160
Tue 4/1121:25SFO - BOS
1 stop7h 50mSouthwest
Thu 6/1106:50BOS - SFO
1 stop10h 30mSouthwest
Deal found 11/9£164
Thu 4/1221:25SFO - BOS
1 stop9h 15mSouthwest
Mon 8/1207:20BOS - SFO
1 stop9h 35mSouthwest
Deal found 11/9£165
Wed 5/1108:20SFO - BOS
2 stops10h 15mSouthwest
Tue 11/1106:45BOS - SFO
1 stop10h 55mSouthwest
Deal found 11/9£168
Sat 1/1117:30SFO - BOS
2 stops12h 35mSouthwest
Tue 4/1107:45BOS - SFO
1 stop8h 35mSouthwest
Deal found 10/9£169
Tue 21/1021:05SFO - BOS
1 stop8h 20mSouthwest
Fri 24/1005:35BOS - SFO
1 stop11h 50mSouthwest
Deal found 9/9£171
Mon 20/1021:05SFO - BOS
1 stop8h 20mSouthwest
Wed 22/1014:05BOS - SFO
1 stop8h 45mSouthwest
Deal found 10/9£173
Fri 12/1221:25SFO - BOS
1 stop7h 40mSouthwest
Mon 15/1207:20BOS - SFO
1 stop9h 35mSouthwest
Deal found 11/9£174
Wed 5/1110:50SFO - BOS
1 stop7h 50mSouthwest
Sun 9/1105:15BOS - SFO
1 stop8h 50mSouthwest
Deal found 10/9£175

Find flights from San Francisco within your budget

 
Find flights departing from San Francisco that match your specified budget. Filter results by price range, allowing you to narrow down options and find flights that fit within your financial constraints. Please note that the search results are based on data from user searches, with fares last updated on 12 September 2025. In the last 7 days, Cheapflights users made a total of 858,174 searches

Fly to

Heathrow

Route

Depart

Return

Price

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Fri 31/10

21:05-08:25

1 stop8h 20m

Boston Logan Intl

Wed 5/11

07:20-13:55

1 stop9h 35m

£197

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Fri 31/10

21:05-08:25

1 stop8h 20m

Boston Logan Intl

Sat 8/11

05:20-11:00

1 stop8h 40m

£197

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Tue 6/1

20:30-05:01

Nonstop5h 31m

Boston Logan Intl

Sat 10/1

06:00-09:55

Nonstop6h 55m

£206

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Sat 25/10

07:11-16:00

Nonstop5h 49m

Boston Logan Intl

Sat 1/11

18:59-22:50

Nonstop6h 51m

£206

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Mon 27/10

07:00-15:41

Nonstop5h 41m

Boston Logan Intl

Tue 4/11

18:59-22:50

Nonstop6h 51m

£206

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Wed 19/11

12:40-21:13

Nonstop5h 33m

Boston Logan Intl

Mon 24/11

19:55-23:53

Nonstop6h 58m

£206

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Tue 21/10

23:30-08:17

Nonstop5h 47m

Boston Logan Intl

Wed 29/10

08:00-11:54

Nonstop6h 54m

£206

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Wed 19/11

07:00-15:41

Nonstop5h 41m

Boston Logan Intl

Mon 24/11

19:33-23:20

Nonstop6h 47m

£206

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Tue 14/10

21:50-06:30

Nonstop5h 40m

Boston Logan Intl

Tue 21/10

07:15-11:02

Nonstop6h 47m

£206

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Sun 19/10

23:30-08:17

Nonstop5h 47m

Boston Logan Intl

Wed 22/10

10:25-13:57

Nonstop6h 32m

£206

Flights are sorted by cheapest return flights first.

Deals found on 10/9

Showing 1-10 of 60 results
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Best time to book a flight from San Francisco

Have a flexible travel schedule? Discover the best time to fly from San Francisco with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Travel insights for flights from San Francisco

Get recent, data-driven insights about flights from San Francisco including ideal travel times, pricing trends, and more.

When is the best time to book a flight from San Francisco?

Use this chart to determine the optimal time to book a return flight from San Francisco to Heathrow. Price data was last updated on 29 August 2025.

Booking 63 days in advance of your planned departure date is, on average, the best time to get cheap flights from San Francisco. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

What is the cheapest month to book a flight from San Francisco?

Currently, October is the cheapest month in which you can book a flight from San Francisco (average of £380). Flying from San Francisco in June will prove the most costly (average of £592). There are multiple factors that influence the price of a flight so comparing airlines, departure airports and times can help keep costs down.

When is the cheapest time to fly from San Francisco?

Use this chart to determine the cheapest time to fly return from San Francisco to Heathrow. Price data was last updated on 7 September 2025.

Those who are seeking the cheapest fare on flights departing from San Francisco would be wise to consider leaving during Sunday at midday when prices are typically at their lowest. When considering other options, price-conscious travelers should avoid Monday mornings when fares are usually the most expensive.

Which airlines fly from San Francisco?

Many airlines operate round-trip flights from San Francisco: Virgin Atlantic, United Airlines, British Airways, Lufthansa, Iberia. These airlines fly to the following popular destinations: London.

United Airlines
United Airlines
From £153
Virgin Atlantic
Virgin Atlantic
From £416
Frontier
Frontier
From £20
Alaska Airlines
Alaska Airlines
From £54

What are popular destinations to fly to from San Francisco?

If you’re flying from San Francisco, these routes are more frequently taken by airlines New York (1,403 flights per day), Chicago (1,082 flights per day) and Los Angeles (953 flights per day).

London
London
From £367
Los Angeles
Los Angeles
From £44
New York
New York
From £126
Las Vegas Harry Reid Intl
Las Vegas Harry Reid Intl
From £35

What is the cheapest place to fly to from San Francisco?

The cheapest city to fly to from San Francisco is Vancouver Intl, with prices starting at £13. Explore other affordable destinations below.

Vancouver Intl
Vancouver Intl
From £17
Las Vegas Harry Reid Intl
Las Vegas Harry Reid Intl
From £35
Los Angeles
Los Angeles
From £44
San Diego
San Diego
From £63

Airline reviews for flights from San Francisco

Get insights into the airlines that provide service from San Francisco. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing airline for your flight from San Francisco. In the last 7 days, Cheapflights users made a total of 858,174 searches.
Check out reviews from past customers who have flown United Airlines, Virgin Atlantic, andIberia from San Francisco to help guide your decision. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
8,937 reviews
Check prices

Entertainment

7.1

Food

6.6

Overall

7.4

Comfort

7.3

Boarding

7.7

Crew

8.1

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
United Airlines
7.4
Good
8,937 reviews
United Airlines
7.4
Good
8,937 reviews
Check prices

Entertainment

7.1

Food

6.6

Overall

7.4

Comfort

7.3

Boarding

7.7

Crew

8.1

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
Virgin Atlantic
7.4
Good
664 reviews
United Airlines
7.4
Good
8,937 reviews
Check prices

Entertainment

7.1

Food

6.6

Overall

7.4

Comfort

7.3

Boarding

7.7

Crew

8.1

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
Iberia
7.0
Good
2,929 reviews
United Airlines
7.4
Good
8,937 reviews
Check prices

Entertainment

7.1

Food

6.6

Overall

7.4

Comfort

7.3

Boarding

7.7

Crew

8.1

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
Lufthansa
6.8
Okay
7,409 reviews
United Airlines
7.4
Good
8,937 reviews
Check prices

Entertainment

7.1

Food

6.6

Overall

7.4

Comfort

7.3

Boarding

7.7

Crew

8.1

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
British Airways
6.7
Okay
7,361 reviews
United Airlines
7.4
Good
8,937 reviews
Check prices

Entertainment

7.1

Food

6.6

Overall

7.4

Comfort

7.3

Boarding

7.7

Crew

8.1

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??

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Related info for your journey

Access useful and relevant information related to your journey from San Francisco. This can include details such as airport transportation, visa requirements, travel insurance, luggage regulations, and any other information that can ensure a smooth and hassle-free travel experience. Please note that the information is based on general guidance and may need to be verified with official sources. Data last updated 12 September 2025.

  • What are the most popular destinations to fly to from San Francisco?

    This month, the top selected destinations from San Francisco are Boston, Barcelona-El Prat Airport, Bengaluru. Throughout the year, Mumbai, Bengaluru, Boston are some of the top choices made by users flying from San Francisco.

  • What is the cheapest flight from San Francisco to anywhere?

    Users have flown out of San Francisco for as low as £13 to Vancouver Intl Airport (prices may vary depending on the airline and departure time). On average, users have booked flights for £431 to fly from San Francisco.

  • What are the cheapest airlines flying from San Francisco to anywhere?

    Over the past few days, we've found that Frontier, Hawaiian Airlines, and Alaska Airlines have the cheapest prices from San Francisco. Frontier flights from San Francisco to Atlanta Hartsfield-Jackson (£15), Hawaiian Airlines flights from San Francisco to Burbank Bob Hope (£36), and Alaska Airlines flights from San Francisco to Honolulu (£40).

  • What is the cheapest premium economy flight from San Francisco?

    Here are some of the cheapest offers we have found for the cheapest premium economy flights from San Francisco.
    San Francisco to Salt Lake City from £486
    San Francisco to Columbus Airport from £617
    San Francisco to Detroit Metropolitan Wayne County Airport from £625
    San Francisco to Orlando Airport from £662

  • What is the cheapest first class flight from San Francisco?

    If you’re looking for a cheap first-class flight from San Francisco, consider Palm Springs. Prices start at £285 so you can fly first-class even on a budget.

  • What is the cheapest month to fly from San Francisco?

    At the present moment the cheapest month to fly from San Francisco is currently October; with June being the most expensive. Prices will vary depending on multiple factors such as booking in advance, airline and departure airports and times.

  • Where are the cheapest places to fly to from San Francisco?

    Check out the cheapest flights from San Francisco to embark to:
    Travel from San Francisco to London from £336 round trip

  • How does Cheapflights help users find flights from San Francisco?

    Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from San Francisco. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

  • Why should you use Cheapflights to find cheap flight tickets from San Francisco?

    Cheapflights helps you find that perfect flight from San Francisco by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

  • Can Cheapflights find flights from San Francisco with no change fees?

    Certainly. Search results for flights from San Francisco shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

  • Can Cheapflights notify me if prices for flights from San Francisco become cheaper?

    Yes! Start tracking prices for flights from San Francisco today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive the alerts.

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How does Cheapflights help users find flights from San Francisco?

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from San Francisco. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

Why should you use Cheapflights to find cheap flight tickets from San Francisco?

Cheapflights helps you find that perfect flight from San Francisco by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

Can Cheapflights find flights from San Francisco with no change fees?

Certainly. Search results for flights from San Francisco shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

Can Cheapflights notify me if prices for flights from San Francisco become cheaper?

Yes! Start tracking prices for flights from San Francisco today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive the alerts.

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